JavaScript: Create a Zerofilled value with optional +, - sign

Last update on May 30 2022 09:58:40 (UTC/GMT +8 hours)

JavaScript String: Exercise-36 with Solution

Write a JavaScript function to create a Zerofilled value with optional +, - sign.

Test Data:
console.log(zeroFill(120, 5, '-'));
"+00120"
console.log(zeroFill(29, 4));
"0029"

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to create a Zerofilled value with optional +, - sign.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function zeroFill(number, width, osign) {
    var num = '' + Math.abs(number),
        zerosw = width - num.length,
        sign = number >= 0;
    return (sign ? (osign ? '+' : '') : '-') +
        Math.pow(10, Math.max(0, zerosw)).toString().substr(1) + num;
}

console.log(zeroFill(120, 5, '-'));

console.log(zeroFill(29, 4));

Sample Output:

+00120
0029

Flowchart:

Live Demo:

See the Pen JavaScript Create a Zerofilled value with optional +, - sign-string-ex-36 by w3resource (@w3resource) on CodePen.

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JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai Jim";
arr[4] = "Borge";

console.log(arr.join());
arr.splice(2, 0, "Lene");
console.log(arr.join());

Ref: https://bit.ly/2BXbp04